Điện tử công suât mạch MMC Modular multilevel converter based STATCOM topology suitable for medium voltage unbalanced systems

... connected Modular Multilevel Converter Based STATCOM Topology Suitable for · · · 573 Fig. 1. Circuit structure of the MMC based STATCOM and the way of its connection to the network. to a medium- voltage ... Electronics, Vol. 10, No. 5, September 2010 JPE 10-5-15 Modular Multilevel Converter Based STATCOM Topology Suitable for Medium- Voltage Unbala...

Ngày tải lên: 15/10/2013, 16:24

... VSC topology. 2.2.3 Modular Multilevel Cascaded Bridge converter (MMC) The recently proposed Modular Multilevel Converter (MMC) concept [1-2,10] attracts significant interest for high -voltage ... probably used as major voltage source converter at medium and high voltage for industry applications. 14 15 Chapter 3 Modular Multilevel Converter...

Ngày tải lên: 15/10/2013, 16:24

... akagi@ee.titech.ac.jp Abstract— A modular multilevel converter (MMC) is one of the next-generation multilevel converters intended for high- or medium- voltage power conversion without transformers. The MMC is based on ... experiment. Keywords— Medium- voltage power conversion, multilevel con- verters, voltage- balancing control. I. I High-power converters fo...

Ngày tải lên: 15/10/2013, 16:24

... following advantages: 1) Surge voltage caused by turning off appears with almost zero static voltage, while voltage source type converter needs to carry the surge voltage on top of a full rated dc link voltage. This ... required. Consequently, saturation voltage can be prioritized, as well as the forward voltage of FWD (free wheeling diode). Fig. 7. Appearance of 1200 V/150 A tr...

Ngày tải lên: 15/10/2013, 16:10

... ON V LL δ I shunt Gate V shunt V dc Voltage (V) Time (ms) Voltage (V) Current (A) 02040 −250 0 250 02040 −8 −4 0 4 8 −2 0 2 S1, S3 ON S2, S4 ON V dc V LL V shunt I shunt Voltage (V) Current (A) Time (ms) δ Gate Voltage ... inverter for speed control B. Control System In order to control the terminal voltage, voltage feedback with PI control is proposed. The control part starts wi...

Ngày tải lên: 15/10/2013, 16:10

... percent for the case with MERS and constant voltage control, and with around 48 percent for the case with maximum power control. The maximum power output for the case without MERS occurs before ... right. −1 0 1 0 1 Time Capacitor Voltage Current (dotted) Not continuous Dc−offset Active by−pass Series Voltage Figure 2: Example of resulting voltage and current curves when control...

Ngày tải lên: 15/10/2013, 16:10

... compared with NO MERS systems. 2. Replace mercury lamp with metal halide lamp with MERS metal halide controller. • Approx. 40% electric power saving compared with NO MERS mercury lamp systems. (from ... recommended Ballast Magnetic steel ballast, rapid or preheat type Electronic ballast is not applicable Operating voltage AC90V up to 240V 50Hz/60Hz, DC not permitted 100V or 200V mode j...

Ngày tải lên: 15/10/2013, 16:10

Ngày tải lên: 15/10/2013, 16:10

... I u =5.7 A Fig. 9. Experimental waveforms of output voltage and current. V uv is line-to- line voltage of the generator, V dc is dc-link voltage, V Cu is capacitor voltage of MERS (u-phase). V. E XPERIMENTAL ... induced electromotive force (EMF), V 0 is output voltage of generator, V is output terminal voltage. - 8 H a 1 N s 1 8 m e r s 1 8 0 Fig. 4. Phasor diagram of synchronous g...

Ngày tải lên: 15/10/2013, 16:11

Ngày tải lên: 15/10/2013, 16:11